import re, json, logging
from django import http
from django.contrib.auth import login, authenticate, logout
from django.urls import reverse
from django.shortcuts import render, redirect
from django.views import View
from django_redis import get_redis_connection
from django.contrib.auth.mixins import LoginRequiredMixin

from meiduo3.utils.views import LoginRequiredJSONMixin
from meiduo3.utils.response_code import RETCODE

from users import constants
from users.models import User, Address
from celery_tasks.send_email.tasks import send_verify_email
from users.utils import generate_verify_email_url, check_verify_email_token
# Create your views here.

# 创建日志输出
logger = logging.getLogger('django')


class UpdateTitleAddressView(LoginRequiredJSONMixin, View):
    """更新地址标题"""

    def put(self, reqeust, address_id):
        """实现更新地址标题逻辑"""
        # 接收参数：title
        json_dict = json.loads(reqeust.body.decode())
        title = json_dict.get('title')

        # 校验参数
        if not title:
            return http.HttpResponseForbidden('缺少title')

        try:
            # 查询当前要更新标题的地址
            address = Address.objects.get(id=address_id)
            # 将新的地址标题覆盖地址标题\
            address.title = title
            address.save()
        except Exception as e:
            logger.error(e)
            return http.JsonResponse({'code': RETCODE.DBERR, 'errmsg': '更新标题失败'})

        # 响应结果
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '更新标题成功'})


class DefaultAddressView(LoginRequiredJSONMixin, View):
    """设置默认地址"""

    def put(self, reqeust, address_id):
        """实现设置默认地址逻辑"""
        try:
            # 查询出当前哪个地址会作为登录用户的默认地址
            address = Address.objects.get(id=address_id)

            # 将指定的地址设置为当前登录用户的默认地址
            reqeust.user.default_address = address
            reqeust.user.save()
        except Exception as e:
            logger.error(e)
            return http.JsonResponse({'code': RETCODE.DBERR, 'errmsg': '设置默认地址失败'})
        # 响应结果
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '设置默认地址成功'})


class UpdateDestoryAddressView(LoginRequiredJSONMixin, View):
    """更新和删除地址"""

    def put(self, request, address_id):
        """更新地址"""
        # 接收参数
        json_dict = json.loads(request.body.decode())
        receiver = json_dict.get('receiver')
        province_id = json_dict.get('province_id')
        city_id = json_dict.get('city_id')
        district_id = json_dict.get('district_id')
        place = json_dict.get('place')
        mobile = json_dict.get('mobile')
        tel = json_dict.get('tel')
        email = json_dict.get('email')

        # 校验参数
        if not all([receiver, province_id, city_id, district_id, place, mobile]):
            return http.HttpResponseForbidden('缺少必传参数')
        if not re.match(r'^1[3-9]\d{9}$', mobile):
            return http.HttpResponseForbidden('参数mobile有误')
        if tel:
            if not re.match(r'^(0[0-9]{2,3}-)?([2-9][0-9]{6,7})+(-[0-9]{1,4})?$', tel):
                return http.HttpResponseForbidden('参数tel有误')
        if email:
            if not re.match(r'^[a-z0-9][\w\.\-]*@[a-z0-9\-]+(\.[a-z]{2,5}){1,2}$', email):
                return http.HttpResponseForbidden('参数email有误')

        # 使用最新的地址信息覆盖指定的旧的地址信息
        try:
            Address.objects.filter(id=address_id).update(
                user=request.user,
                title=receiver,
                receiver=receiver,
                province_id=province_id,
                city_id=city_id,
                district_id=district_id,
                place=place,
                mobile=mobile,
                tel=tel,
                email=email
            )
        except Exception as e:
            logger.error(e)
            return http.JsonResponse({'code': RETCODE.DBERR, 'errmsg': '修改地址失败'})

        # 响应新的地址信息给前端渲染
        address = Address.objects.get(id=address_id)
        address_dict = {
            "id": address.id,
            "title": address.title,
            "receiver": address.receiver,
            "province": address.province.name,
            "city": address.city.name,
            "district": address.district.name,
            "place": address.place,
            "mobile": address.mobile,
            "tel": address.tel,
            "email": address.email
        }
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '修改地址成功', 'address': address_dict})

    def delete(self, request, address_id):
        """删除地址"""
        # 实现指定地址的逻辑删除：is_delete=True
        try:
            address = Address.objects.get(id=address_id)
            address.is_deleted = True
            address.save()
        except Exception as e:
            logger.error(e)
            return http.JsonResponse({'code': RETCODE.DBERR, 'errmsg': '删除地址失败'})

        # 响应结果：code, errmsg
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '删除地址成功'})


class AddressCreateView(LoginRequiredJSONMixin, View):
    """新增地址"""

    def post(self, request):
        """实现新增地址逻辑"""
        #判断是否超过地址上限
        count = request.user.addresses.count()
        if count >= constants.USER_ADDRESS_COUNTS_LIMIT:
            return http.JsonResponse({'code': RETCODE.THROTTLINGERR, 'errmsg': '超过地址上限'})

        # 接受参数
        json_dict = json.loads(request.body.decode())
        receiver = json_dict.get('receiver')
        province_id = json_dict.get('province_id')
        city_id = json_dict.get('city_id')
        district_id = json_dict.get('district_id')
        place = json_dict.get('place')
        mobile = json_dict.get('mobile')
        tel = json_dict.get('tel')
        email = json_dict.get('email')

        # 校验参数
        if not all([receiver,province_id,city_id,district_id,place,mobile]):
            return http.HttpResponseForbidden('缺少必传参数')
        if not re.match(r'^1[3-9]\d{9}$',mobile):
            return http.HttpResponseForbidden('参数mobile有误')
        if tel:
            if not re.match(r'^(0[0-9]{2,3}-)?([2-9][0-9]{6,7})+(-[0-9]{1,4})?$', tel):
                return http.HttpResponseForbidden('参数tel有误')
        if email:
            if not re.match(r'^[a-z0-9][\w\.\-]*@[a-z0-9\-]+(\.[a-z]{2,5}){1,2}$', email):
                return http.HttpResponseForbidden('参数email有误')

        # 保存地址信息
        try:
            address = Address.objects.create(
                user =request.user,
                title = receiver,
                receiver = receiver,
                province_id = province_id,
                city_id = city_id,
                district_id = district_id,
                place =place,
                mobile =mobile,
                tel = tel,
                email =email,
            )

            # 设置默认地址
            if not request.user.default_address:
                request.user.default_address = address
                request.user.save()
        except Exception as e:
            logger.error(e)
            return http.JsonResponse({'code': RETCODE.DBERR, 'errmsg': '新增地址失败'})

        # 新增地址成功，将新增的地址响应给前端实现局部刷新
        address_dict = {
            "id": address.id,
            "title": address.title,
            "receiver": address.receiver,
            "province": address.province.name,
            "city": address.city.name,
            "district": address.district.name,
            "place": address.place,
            "mobile": address.mobile,
            "tel": address.tel,
            "email": address.email
        }

        # 响应保存结果
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '新增地址成功', 'address': address_dict})


class AddressView(LoginRequiredMixin, View):
    """用户收货地址"""
    def get(self, request):
        """提供收货地址界面"""
        # 获取用户地址列表
        login_user = request.user
        addresses = Address.objects.filter(user=login_user, is_deleted=False)

        address_dict_list = []
        for address in addresses:
            address_dict = {
                "id": address.id,
                "title": address.title,
                "receiver": address.receiver,
                "province": address.province.name,
                "city": address.city.name,
                "district": address.district.name,
                "place": address.place,
                "mobile": address.mobile,
                "tel": address.tel,
                "email": address.email
            }

        context = {
            'default_address_id': login_user.default_address_id,
            'addresses': address_dict_list,
        }

        return render(request, 'user_center_site.html', context)


class VerifyEmailView(View):
    """验证"""
    def get(self, request):
        # 接收参数
        token = request.GET.get('token')

        # 校验参数
        if not token:
            return http.HttpResponseForbidden('缺少token')

        # 从token中提取用户信息user_id   user
        user = check_verify_email_token(token)
        if not user:
            return http.HttpResponseBadRequest('无效的token')

        # 将email_active字段设置为True
        try:
            user.email_active = True
            user.save()
        except Exception as e:
            logger.error(e)
            return http.HttpResponseServerError('激活邮箱失败')

        # 响应结果： 重定向到用户中心
        return redirect(reverse('users:info'))


class EmailView(LoginRequiredJSONMixin, View):
    """添加邮箱"""

    def put(self, request):
        """实现添加邮箱逻辑"""
        # 接收参数 body是bytes 需要decode
        json_dict = json.loads(request.body.decode())
        email = json_dict.get('email')

        # 校验参数
        if not email:
            return http.HttpResponseForbidden('缺少email参数')
        if not re.match(r'^[a-z0-9][\w\.\-]*@[a-z0-9\-]+(\.[a-z]{2,5}){1,2}$', email):
            return http.HttpResponseForbidden('参数email有误')

        # 保存email
        try:
            request.user.email = email
            request.user.save()
        except Exception as e:
            logger.error(e)
            return http.HttpResponseForbidden('参数email有误')

        # 发送邮箱验证邮件
        verify_url = generate_verify_email_url(request.user)
        send_verify_email.delay(email, verify_url) # 一定要调用delay

        # 响应结果
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '添加邮箱成功'})



class UserInfoView(LoginRequiredMixin,View):
    """用户中心"""
    def get(self,  request):
        """提供用户中心页面"""
        context ={
            'username': request.user.username,
            'mobile': request.user.mobile,
            'send_email': request.user.email,
            'email_active': request.user.email_active,
            'email': request.user.email
        }

        return render(request, 'user_center_info.html', context= context)


class LogoutView(View):
    """ 用户退出登录 """
    def get(self,request):
        # 清除状态保持信息
        logout(request)

        # 退出登录后 重定向到首页
        response = redirect(reverse('contents:index'))

        # 删除cookie中的用户名
        response.delete_cookie('username')

        # 响应结果
        return response


class LoginView(View):
    """用户登录"""
    def get(self, request):
        """提供用户登录页面"""
        return render(request, 'login.html')

    def post(self, request):
        """实现用户登录逻辑"""
        # 接收参数
        username = request.POST.get('username')
        password = request.POST.get('password')
        remembered = request.POST.get('remembered')

        # 校验参数
        if not all([username, password]):
            return http.HttpResponseForbidden('缺少必传参数')
        # 判断用户名是否是5-20个字符
        if not re.match(r'^[a-zA-Z0-9_-]{5,20}$', username):
            return http.HttpResponseForbidden('请输入正确的用户名或手机号')
        # 判断密码是否是8-20个数字
        if not re.match(r'^[0-9A-Za-z]{8,20}$', password):
            return http.HttpResponseForbidden('密码最少8位，最长20位')

        # 认证用户 : 使用账号查询用户是否存在 如果用户存在 再校验密码是否正确
        user = authenticate(username=username, password=password)
        if user is None:
            return render(request, 'login.html', {'account_errmsg': '账号或密码错误'})

        # 状态保持
        login(request, user)
        # 使用remembered确定状态保持周期（实现记住登录）
        if remembered != 'on':
            # 没有记住登录：状态保持在浏览器会话结束后就销毁
            request.session.set_expiry(0)
        else:
            # 记住登录 状态保持周期为 默认为两周
            request.session.set_expiry(None)

        # 响应结果
        # 先取出next
        next = request.GET.get('next')
        if next:
            # 重定向到next
            response = redirect(next)
        else:
            # 重定向到首页
            response = redirect(reverse('contents:index'))

        # 为了实现在首页右上角展示用户名信息，我们需要将用户名缓存到cookie中
        response.set_cookie('username', user.username, max_age=3600 * 24 *15)

        # 响应结果 重定向到首页
        return response

class UsernameCountView(View):
    """判断用户名是否重复"""

    def get(self, request, username):
        """

        :param request:  请求对象
        :param username: 用户名
        :return: Json
        """
        count = User.objects.filter(username=username).count()
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': 'OK', 'count': count})




class MobileCountView(View):
    """判断mobile是否重复"""

    def get(self, request, mobile):
        """

        :param request:  请求对象
        :param mobile: mobile
        :return: Json
        """
        count = User.objects.filter(mobile=mobile).count()
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': 'OK', 'count': count})



class RegisterView(View):
    """用户注册"""

    def get(self, request):
        """

        :param request:
        :return: 注册界面
        """
        return render(request, 'register.html')

    def post(self, request):
        """

        :param request:
        :return:  注册结果
        """
        # 接受参数
        username = request.POST.get('username')
        password = request.POST.get('password')
        password2 = request.POST.get('password2')
        mobile = request.POST.get('mobile')
        allow = request.POST.get('allow')
        sms_code_client = request.POST.get('sms_code')

        # 校验参数
        if not all([username, password, password2, mobile, allow]):
            return http.HttpResponseForbidden('缺少必传参数')
        if not re.match(r'^[a-zA-Z0-9_]{5,20}$', username):
            return http.HttpResponseForbidden('请输入5-20个字符的用户名')
        if not re.match(r'^[a-zA-Z0-9]{8,20}$', password):
            return http.HttpResponseForbidden('请输入8-20位的密码')
        if password != password2:
            return http.HttpResponseForbidden('两次输入的密码不一致')
        if not re.match(r'^1[3-9]\d{9}$', mobile):
            return http.HttpResponseForbidden('请输入正确的手机号码')
        # 判断短信验证码是否输入正确
        redis_conn = get_redis_connection('verify_code')
        sms_code_server = redis_conn.get('sms_%s' % mobile)
        if sms_code_server is None:
            return render(request, 'register.html', {'sms_code_errmsg': '短信验证码已失效'})
        if sms_code_client != sms_code_server.decode():
            return render(request, 'register.html', {'sms_code_errmsg': '输入短信验证码有误'})

        if allow != 'on':
            return http.HttpResponseForbidden('请勾选用户协议')

        try:
            user = User.objects.create_user(username=username, password=password, mobile=mobile)
        except Exception as e:
            print(e)
            return render(request, 'register.html', {'register_errmsg': '注册失败'})

        # 登录用户 实现状态保持
        login(request, user)

        # 响应结果
        response = redirect(reverse('contents:index'))

        # 为了实现在首页右上角展示用户名信息，我们需要将用户名缓存到cookie中
        response.set_cookie('username', user.username, max_age=3600 * 24 *15)

        # 响应结果 重定向到首页
        return response







